im trying to extend my 07 zx6r without having to pay for a swingarm and i cant seem to find any blocks. and i was also wondering if the swing arm on the 636 is the same as the zx6

 

07-08 zx6r is different than the 636, check ebay, lots of people dont like the blocks , but they seem fine to me.

 

I can get swingarm extensions for your bike.. let me know if you are having trouble finding them. I use them on my 10R and my Husband uses extensions on his 636 so do quite a few people I drag race with and they all are happy with them.